Misha Collins is far more than the angel Castiel on the much-adored fantasy adventure series "Supernatural." He also is dedicated to charity work, this time of year partially in the form of the world's largest media scavenger hunt. READ MORE: Why The CW Deserves Your Attention For years, Misha Collins has curated a list of tasks ranging from imaginative to absurd, allowing people to compete in an international competition that could bring them anywhere from a water park to a particle...